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Growth and characterization of sodium-tungsten oxide nanobelts with U-shape cross section

Azimirad, R ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jcrysgro.2007.11.133
  3. Publisher: 2008
  4. Abstract:
  5. A simple method for synthesis of Na0.65WO3 nanobelts by using sodium, as a catalyst, in soda-lime glass substrate was reported. The synthesized product was characterized and analyzed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and ultraviolet-visible spectrophotometery. According to SEM observations, nanobelts with U-shape cross section grew between sodium-tungsten oxide islands. The thickness, width, and length of nanobelts were measured <100 nm, between 300 nm-3 μm and 5-20 μm, respectively. In addition, it was observed that some of the nanobelts were constituted from nanowires. Based on XPS analysis, more than 70% of the film surface was in W6+ chemical state. XRD analysis determined that the sample was mainly composed of cubic Na0.65WO3 phase with strong (0 1 1) and (0 0 1) diffraction peaks. Optical transmission and reflection of the sample in the visible and near-infrared wavelengths were measured around 15% and 2%, respectively. © 2007 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Characterization ; Light transmission ; Scanning electron microscopy ; Spectrophotometry ; X ray diffraction ; Chemical state ; Diffraction peaks ; Sodium tungsten oxide ; Nanobelts
  8. Source: Journal of Crystal Growth ; Volume 310, Issue 4 , 2008 , Pages 824-828 ; 00220248 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S0022024807010275